style gold deposit

Hemi discovery, Mallina gold province

Gold Project •New style of gold deposit in WA's Pilbara region: Intrusion-hosted Large scale, close to surface, grade continuity Underexplored with district-scale upside •Located near world-class established mining infrastructure and major regional centres

Fortitude Gold aiming for a 'home-run style deposit' at ...

Fortitude Gold Corp (OTCQB:FTCO) CEO Jason Reid tells Proactive the group has found 'good widths of mineral' around a lithocap formulation, after it undertoo...

Gold - Department for Energy and Mining

Information update . As recently as 15 years ago, Archaean gold systems were an unknown concept in South Australia. Now these systems within the Gawler Craton are demonstrated by a newly recognised gold deposit style with mined and contained resources surpassing one million ounces.

The Tocantinzinho Paleoproterozoic Porphyry-Style Gold ...

Compared with other deposits, Tocantinzinho has similarities with magmatic-hydrothermal oxidized calc-alkaline granite-related gold deposits classified as porphyry gold deposits but we classify as a porphyry-style gold deposit, as it lacks some characteristics of the Phanerozoic porphyry-type deposits.

Figure 10 from Metamorphic rock-hosted orogenic gold ...

Fig. 10. The Bombana and Buru Island metamorphic-hosted gold deposit plotted on the conceptual orogenic gold deposit model from Groves et al. (1998, 2003) emplaced into shallow level at the transition between epizonal and mesozonal (approximately 5 km below paleosurface). - "Metamorphic rock-hosted orogenic gold deposit style at Bombana (Southeast Sulawesi) and Buru Island …

Diversity in Carlin-Style Gold Deposits | GeoScienceWorld ...

Chapter 1: Nevada's Carlin-Type Gold Deposits: What We've Learned During the Past 10 to 15 Years. Author (s) Jean S. Cline. Jean S. Cline. University of Nevada Las Vegas, Department of Geoscience, 4505 Maryland Parkway, Las Vegas, Nevada 89145-4010. Search for other works by this author on: GSW. Google Scholar. Doi:

When it comes to gold deposits, grade is NOT king - Stockhead

"In my opinion, you definitely need to separate deposits by mineralisation style — orogenic, epithermal, porphyry, IOCG (iron oxide copper gold) and so on," Ulrich says. "The two lowest cost mines Ernest Henry (iron oxide copper gold) and Cadia (porphyry) are low grade compared to Fosterville (orogenic) – probably the highest grade ...

Lesson 2 - How To Find Lode Gold Deposits - Technical ...

How to locate lode gold deposits with special emphasis on all the detailed information available today and why old mines are often available for claiming.

20.1 Metal Deposits – Physical Geology

Most porphyry deposits also host some gold, which may be, in rare cases, the primary commodity. B.C. examples include several large deposits within the Highland Valley mine (Figure 20.1) and numerous other deposits scattered around the central part of the province. A porphyry deposit forms around a cooling felsicstock in the upper part of the ...

Vein Gold | Two Types of Gold Deposits | Gold in Nature ...

This heat caused hot, quartz-rich fluids to ooze through the folding rocks, dissolving and concentrating gold. As the hot quartz-rich fluids cooled, gold was precipitated out into quartz veins. Gold in quartz vein. Moose River, 3.13 troy ounces of gold. The majority of gold in Nova Scotia occurs as quartz vein deposits.

Cobalt—Styles of Deposits and the Search for Primary Deposits

sedimentary rock-hosted deposits in back arc and rift environments associated with mafic-ultramafic rocks. Metasedimentary cobalt-copper-gold deposits (such as Blackbird, Idaho), iron oxide-copper-gold deposits, and the five-element vein deposits (such as Cobalt, Ontario) contain different amounts of cobalt.

Diversity in Carlin-Style Gold Deposits - GeoScienceWorld

Mining of Carlin-type gold deposits in Nevada has made the United States one of the leading gold producers in the world for almost four decades. These deposits constitute an endowment of ~255 Moz (7,931 tonnes) of gold, of which 89% occurs in four main clusters of deposits: the Carlin trend, Getchell, Cortez, and Jerritt Canyon.

Carlin–type gold deposit - Wikipedia

Carlin–type gold deposits are sediment-hosted disseminated gold deposits. These deposits are characterized by invisible (typically microscopic and/or dissolved) gold in arsenic rich pyrite and arsenopyrite. This dissolved kind of gold is called "Invisible Gold", as it can only be found through chemical analysis. The deposit is named after the Carlin mine, the first large deposit of this type ...

THE GENESIS OF AN EPIZONAL DEPOSIT - New Found Gold …

STYLE OF MINERALIZATION OF THE QUEENSWAY LODE AU SYSTEM 1km 5km recharge of meteoric ﬂuids metamorphic ﬂuids ... cavities, lined with quartz crystals from each deposit. Native gold is also visible in each sample. Such open space cavities are indicative of a shallow level of deposition for both deposits. Left, core from Keats zone, Queensway ...

DIVERSITY OF CARLIN-STYLE GOLD DEPOSITS

Ore Genesis Constraints on the Agdarreh and Zarshouran Carlin-Style 299 Gold Deposits in the Takab Region of Northwestern Iran F. Daliran, A. Hofstra, J. Walther, and D. Topa Chapter 10 Comparison of the Allchar Au-As-Sb-Tl Deposit, Republic of Macedonia, 335 with Carlin-Type Gold Deposits

Motherload Suggestion 3: Orogenic and Carlin style Gold ...

The reward for finding an orogenic gold deposit would be 750 to 1000 gold ore. This is a lot, but take into account the rarity. This is actually less than Carlin gold but the orogenic type would not be spread over a 5x5 chunk area but rather a 2x2 chunk area extending some 15 blocks up.

Yalgoo Gold Project - Firefly Resources

The Yalgoo Gold Project includes the advanced Melville gold deposit, which hosts a JORC 2004 Mineral Resource of 2.75Mt grading 1.57g/t Au for 140,000 ounces of contained gold (0.8g/t cut-off)1 (Melville Deposit*). Mineralisation within the Melville Deposit is hosted within a completely unmined steeply-dipping "stacked-lode" system, with ...

PorterGeo Database - Ore Deposit Description

Newcrest Mining staff 1996 - The Cadia Wallrock-Porphyry Style Gold-Copper Deposit, NSW : in Porphyry related copper and gold deposits of the Asia Pacific Region, Conf. Proc., Cairns, 12-13 Aug., 1996 AMF, Adelaide pp 16.1-16.10

Where to Safely Store Your Gold - The New York Times

Style. Today's Paper ... We're in the midst of a modern-day gold rush. ... "You can use a safe deposit box, but folks worry that if there was an economic meltdown, the banks might close, and ...

Major Styles of Mineralization and Hydrothermal Alteration ...

in deposits and related alteration assemblages, influence the chemical response of the deposits to weathering. The mineral-ogy and trace-element compositions of the deposits and the altered wallrocks also importantly affect the chemical and physical response to weathering and environmental disper-

Gold Deposit Classification: List of 10 Types of Gold Deposits

The Tocantinzinho Paleoproterozoic Porphyry-Style Gold ...

The Tocantinzinho gold deposit, located in the Tapajós Mineral Province, Amazonia, Brazil, is considered the largest gold deposit in the region. It is a stockwork-disseminated gold deposit, hosted in a 1982 ± 8 Ma hydrothermalized monzogranite of the Creporizão Intrusive Suite, with petrographic and geochemical characteristics of volcanic arc to post-collisional granites.

Carlin-style gold deposits, Youjiang Basin, China: tectono ...

The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic gold deposits or classified as a new intermediate deposit type. However, in terms of a multi-scale mineral system approach, they show remarkable similarities to the Tertiary Carlin-type deposits of Nevada and distinct contrasts to orogenic gold deposits. Both the …

Orogenic gold deposits: deposit models to exploration ...

Orogenic gold deposits, or gold deposits in metamorphic rocks, are the spatially and temporally most widespread gold deposit type, defining important exploration targets in Precambrian shields and in Phanerozoic orogen ic belts. Detailed material for this globally important deposit type will be provided on tectonic and structural controls,

Carlin-Type Deposit - an overview | ScienceDirect Topics

They are low-temperature replacement-style deposits with lattice-hosted gold found in arsenic-rich rims to fine-grained disseminated pyrite. The deposits are recognized to have formed at shallow depth (< 3 km) at 42–34 Ma from low-salinity aqueous fluids of likely magmatic origin and during a transitional period from compression to extension.

Carlin Type Gold Deposit - Mineral Processing & Metallurgy

What makes it a Carlin Type Gold Deposit? There's some confusion, sometimes about what defines Carlin style deposits. Some geologists referred to them in a sediment-hosted gold deposit and include almost any gold deposit hosted in sedimentary rocks in this grouping however I think that most geologists prefer a tighter definition.

Porphyry-Style Petropavlovskoe Gold Deposit, the Polar ...

Geological and structural conditions of localization, hydrothermal metasomatic alteration, and mineralization of the Petropavlovskoe gold deposit (Novogodnenskoe ore field) situated in the northern part of the Lesser Ural volcanic-plutonic belt, which is a constituent of the Middle Paleozoic island-arc system of the Polar Urals, are discussed. The porphyritic diorite bodies pertaining to the ...

Brief Geology of Cripple Creek – Gold Cube

The hydrothermal gold deposit of Cripple Creek is classified as an epithermal deposit, meaning it formed at low pressure (shallow) around 50-300deg C. This deposition process may have taken as long as two million years to occur. During this time, the gold precipitated out of solution, along with tellurium, into telluride crystals which formed ...

Hydrothermal alteration styles in ancient and modern ...

genic gold deposit alteration by examining two different mineralisation systems in southernNew Zealand. Both these orogenic gold mineralisation systems affected the same suite of host rocks which are broadly uniform over large areas, so the vagaries of different rock types can be removed from